Brackets and mounts
Iris Diaphragm Lid Assembly
- Bounding box
- 2792.0 × 74.0 × 22.0 mm
- Engine
- Precision B-rep
- Parameters
- 39
- Published
- August 7, 2026
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The prompt
Design a fully parametric 3D CAD assembly of a reusable aluminium nicotine pouch tin with an integrated rotating camera iris diaphragm lid. The tin body is a simple cylindrical container, 74 mm outside diameter and 22 mm overall height, with no moving parts. The lid is the only mechanical assembly. The outer edge of the lid is a fixed-height rotating grip ring with deep scalloped finger grooves similar to a luxury dive watch bezel. Rotating this outer ring directly rotates an internal actuator ring. The actuator ring drives a conventional 10-blade camera iris diaphragm using ten identical stainless steel blades. Every iris blade must be identical in geometry, with one pivot hole, one drive slot, identical curvature, identical thickness, and equally spaced around the centre. The blades pivot on ten fixed pins mounted in a stationary blade carrier and are driven by ten pins attached to the rotating actuator ring. Rotation of approximately 30 degrees opens the iris concentrically from a fully closed position to an opening diameter of approximately 28 mm, allowing a user to remove a nicotine pouch. Rotating the ring back closes the aperture completely. There must be no push buttons, no child lock, no magnets, no bayonet lock, no springs, no secondary lids, no lifting tray, no sliding shutter, no centre button, and no additional moving mechanisms. The centre of the lid is the iris only. Design the assembly using realistic engineering practices suitable for CNC machining and laser-cut components. Materials: tin body and outer lid in 6061-T6 anodised aluminium, iris blades in 0.20 mm 301 spring stainless steel, blade carrier in anodised aluminium or POM (Delrin), pivot pins in stainless steel. Include proper clearances, rotational constraints, concentric alignment, realistic tolerances, and ensure there is no interference between moving blades throughout the full range of motion. Generate a complete parametric assembly including exploded view, section view, individual part models, assembly constraints, bill of materials, and motion simulation showing the iris opening and closing. The final design should resemble a precision camera lens mechanism integrated into the lid of a standard nicotine pouch tin, with the iris diaphragm being the only moving feature.
Parameters
| Name | Value | Range |
|---|---|---|
| Layout Gap (X spacing) | 80 mm | 10 – 200 |
| Tin Body OD | 74 mm | 50 – 100 |
| Tin Body Height | 22 mm | 10 – 50 |
| Wall Thickness | 1.5 mm | 0.5 – 5 |
| Bottom Thickness | 1.5 mm | 0.5 – 5 |
| Blade Carrier OD | 70 mm | 50 – 100 |
| Blade Carrier Thickness | 3 mm | 0.5 – 10 |
| Central Hole Dia | 30 mm | 10 – 60 |
| Pivot Bolt Circle Dia | 60 mm | 30 – 70 |
| Pivot Hole Dia | 1.5 mm | 0.5 – 3 |
| Outer Grip Ring OD | 74 mm | 50 – 100 |
| Outer Grip Ring ID | 68 mm | 40 – 80 |
| Height | 8 mm | 3 – 20 |
| Scallop Radius | 1.5 mm | 0.5 – 5 |
| Scallop Depth | 0.5 mm | 0.1 – 2 |
| Scallop Count | 60 | 10 – 120 |
| Actuator Ring OD | 66 mm | 50 – 80 |
| Actuator Ring ID | 58 mm | 30 – 70 |
| Thickness | 2 mm | 0.5 – 10 |
| Drive Bolt Circle Dia | 54 mm | 30 – 64 |
| Drive Hole Dia | 1.2 mm | 0.5 – 3 |
| Blade Count | 10 | 3 – 20 |
| Blade Length (pivot to slot) | 10 mm | 5 – 20 |
| Blade Width | 2 mm | 0.5 – 5 |
| Blade Thickness | 0.2 mm | 0.1 – 1 |
| Curvature Height | 1 mm | 0 – 3 |
| Pivot Hole Dia | 1.5 mm | 0.5 – 3 |
| Drive Slot Width | 1.3 mm | 0.5 – 2 |
| Drive Slot Length | 2 mm | 1 – 5 |
| Pivot Pin Dia | 1.5 mm | 0.5 – 3 |
| Pivot Pin Length | 3 mm | 1 – 10 |
| Fillet Radius | 0.2 mm | 0 – 0.5 |
| Drive Pin Dia | 1.2 mm | 0.5 – 3 |
| Drive Pin Length | 3 mm | 1 – 10 |
| Fillet Radius | 0.1 mm | 0 – 0.5 |
| Retaining Ring OD | 70 mm | 50 – 90 |
| Retaining Ring ID | 68 mm | 40 – 80 |
| Thickness | 1 mm | 0.2 – 3 |
| Gap Width | 2 mm | 0.5 – 5 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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